48. Let
ρ
be the density of the cylinder (0.30 g/cm
3
or 300 kg/m
3
) and
ρ
Fe
be the density
of the iron (7.9 g/cm
3
or 7900 kg/m
3
).
The volume of the cylinder is
V
c
= (6
×
12) cm
3
= 72 cm
3
= 0.000072 m
3
,
and that of the ball is denoted
V
b
. The part of the cylinder that is submerged has volume
V
s
= (4
×
12) cm
3
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 Spring '08
 Any
 Physics, 7.9 g, 300 kg, 9.7 mm, 0.30 g, 998 kg

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